I'm not sure where things are going with this guy I'm seeing and I need some advice on how to approach him about it.

So I was talking to this guy at the end of 2015 and we never really met up cause I got stressed out with exams and stuff. On Valentine's Day 2016 he had texted and wanted to meet up and go out to eat later that week. We met up and it was so much fun! We even talked about what we were looking for. We were both on the idea that we were looking for something more than FWB and would be open if something more came along. Whenever we try to hangout, 80% of the time we can't go through with plans cause either one of us has something to do. Which is disappointing but it doesn't make me angry cause I'm studious and I'm glad he is too. He initiated everything we've done, kissing and other sexual things. We even talked about how eventually we want to top each other. I haven't seen him for almost two weeks and he is super bad at texting back (or maybe he is intentionally not texting me) but I'm understanding that he is busy. He was suppose to go out for my birthday with me but cancelled for school work. I was pretty down about it but then he hadn't even told me happy birthday. When we are together I don't doubt that he is into but it could also be a facade. Right now I'm out of town visiting some friends during spring break. The first night I was out he asked if I was going to hook up with someone. I felt bad that he asked me that, that he would think I would do that too him, but we also have t defined ourselves as exclusive (I guess I had just assumed it). Anyways I (drunkenly) told him that I wouldn't be hooking up with anyone unless it was him. And replied "lol ahh 😁." You couldn't have knocked the smile off my face. But I thought more about it and was let down that he hadn't said more about it. I'm definitely going to talk to him about it and I'd rather do it in person. I just don't want to come off clingy. I don't think I'm being clingy it's not like I'm making a big deal out of never hanging out. I'm not saying I'm ready to get super serious with him, but I just want to know more about him and see him more. Or, unfortunately be able to move on if he doesn't want to do what we're doing anymore. I just don't get it cause he initiated it all. Maybe things will change when I get back. But I fear it's just gonna go the same way. Any advice on what is going on and what I should do?